Steam-boiler



G. SEWELL.

STEAM BOILBR.

(No Model.)4

Patented Apr. 18, 1882,.

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SPECIFICATION forr-ningpart of I-.etters Patent Ida-256,602, dated April 18, 1882. Application filed July 20, 1881. (No model.)

To all whom it may concern Zen of the United States, residing in the city of Newark, in the countyofFissex and State of New Jersey, have invented new and useful Improvements in Steam Boilers or Steam- Generators, which improvement is'fully set forth and illustrated in the following specification and accompanying drawings.

The object of this :invention is to supply a 'method by which a great number of tubes having their axes in parallel lines one with another can be secured to the convex surface of cylindricalboiler or other vessel constructed of. one or more plates of metal.

The invention further consists in an arrangement of pipes within the boiler, that will enable an attendant to thoroughly control the circulation of the water within the same. The said pipes will also serve as a means of voiding the boiler of water when desired.

In the accompanying` drawings, Figure 1 is a front elevation of a cylindrical boiler, the front plate and he'ad of the boiler being dispensed with the better to show my imgrovement. Fig. 2 is a median longitudinal vertical section through Fig. l. Fig. 3 is aplan of damper. Fig. 4 is a plan of calorimeter-plate. (See Patent No. 239,348.)

Thefollowingis a description in detail of the construction and. operation of my invention.

Like reference in the several drawings and iigures indicate the saine parts.

Socket-plate hand sockets h' form one single casting. Socket-plate h is designed to be secured to the lower convex surface of a cylindrical boiler, occupying ahorizontal plane, and thus afford a Vpractical means of adaptin'g the drop-tube system to a cylindrical vessel or boiler. The sockets h' are to receive and hold in position tubes G, G', and G". The upper surface of socket-plate h mustV conform toa given radius, as shown on the accompanying drawings, Fig. 1. The form of the said socketplate practically con lines its construction to that of a casting.

The thickness of metal ofsocket-plate h,when added to the thickness of metal of the boiler, to which it would be attached, would present a thickness of metal that could not be properly protectedfrom the effect of the direetheat from the furnace by the water in the boiler. Hence the necessity for some other protection. It is therefore designed to till space a, Figs. l and 2 on the accom pan ying drawings, with tire-clay or other efficient non-conductor of heat, and to protect the tire-clay from disintegration plate r is introduced. It will thus be seen that in protecting socket-plate h from the direct action of the heat from the furnace the bottom of the boiler will also be completely protected from dainage by undue heat under all circumstances. The openings through damper-plate w must correspond with the openings in the calorimeter-4 plate. The movement of the damper will bein a line with the axis of D, and will be operated by any suitable mechanical device.

x', Fig. 2, is a damper designed to control the connection between the boiler and the smokepipe.

D' is a pipe with either end closed and suitably located within the boiler, as shown in Figs. 1 and 2 on the accompanying drawings, con'- necting with either side of said pipe D', and extending horizontally over the center of tub s G, G' and G" are pipes p. Pipes t connect with pipesp and extend down into tubes G,.G', and G" to thelowest point, as shown in section of tube G at t, Fig. 2. Pipe e connects with check-valve 7c. The object of this arrangement or system of pipes D' p t e and pipe b through check-valve 7c is to deliver the feed-water directly upon the inner surface of the bottom of tubes Gand the others. The feed-water being forced into these tubes with a pump, it would necessarily be delivered with more or less force upon the inner surface of the bottom of the tubes, which will tend to prevent the formation of scale on the inner bottom of said tubes.

When feeding the boiler with saline or other impure waterit is designed to circulate the water in the boiler by artificial means by taking the water from the boiler at pipe m, Fig. 2, or

from any other suitable point, and deliver it into feed-pipe b, whence it will bc returned to Vthe boiler with the feed-water.

This arrangement of pipes D', p, t, e, and b through check-valve 7c, (the latter being constructed to lift at will,) will serve (technically speaking) to blow'out the boiler.

Tubes G' form either side wall of the furnace, and tubes G" form the back wall of the ICO same. b', side plates to the furnace, and also support the boiler and tubes.

Gylinderor boiler D will be supported by tbe bearers Y, the lutter being secured to b.

n, Fig. 1, is designed to protect tubes G from lateral strain during operations in the furnace; c, fire-grate; S, furnace-door; Z, fire-brick to protect'J plate w from the heat from the furnace; l', back plate iuclosing buck tubes, G, aud ulso support the boiler D.

Having fullydeseribed myinveutioin claim and desire to secure by Lettersv Patent- 1. Socket-plate h, with drop-tubes G, G', and G" secured to and within sockets h', in combination with o cylindrical boiler, D, substantially as and for the purpose set forth.

2. Pipes D p t a b and check-valve 7c, iu combination with hanging or pending tubes G, G', and G, substantially as described, and for the purpose set forth.

GEORGE SEWELL. Witnesses:

REGINALD H. BROMTNALL, J oHN D. TorriN. 

